import 'dart:convert' as convert;
import 'package:http/http.dart' as http;

void main() async {
    var url = 'http://192.168.100.20:30000/Api/ImageValidCode/make?w=100&h=38&r=0.7393096467360938';
    var response = await http.get(url);
    if(response.statusCode == 200){
        var json = convert.jsonDecode(response.body);
        print(json);
    }
}